Giải x(x^2 - 5x + 2) - (x + 3)(x^2 - 2)

giúp mik đến câu 20 vs , ai lm đc 150 xu ạ
----- Nội dung dịch tự động từ ảnh -----
8) x(x −5x+2)−(x+3)(x −2);
10) (x−5)(x+7)-7x(x+3); 13
12) (x+5)(x+7)−(x−4)(x+3);
14) (2x-3)(x+4)+(-x+1)(x-2);
16) (x+3)(x-1)-(x-7)(x-6);
18) 5x(x-3)(x-1)-4x(x²-2x);
20) -3(x+4)(x-7)+7(x-5)(x-1);
4 →3x(x-5)+(x-3)(* ~!),
9) 4x(x²-x-1)-(x²-2)(x+3);
11) x(x²-x-2)-(x+5)(x-1); b
13) (x-1)(x+2)-(x+5)(x-2);
15) (-x+5)(x+3)+(2x-1)(x+3);
17) (-x-2)(x+1)-(x-5)(-x+1);
our
our hob o cox ab BY HOU
19) -4x(x+3)(x-4)-3x (x²-x+1)
21) 4x(x²-x+3)-(x-6)(x-5).
ab meig súdt vil ooit
osrif